imap.php

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<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to version 1.0 of the Zend Framework
 * license, that is bundled with this package in the file LICENSE.txt, and
 * is available through the world-wide-web at the following URL:
 * http://framework.zend.com/license/new-bsd. If you did not receive
 * a copy of the Zend Framework license and are unable to obtain it
 * through the world-wide-web, please send a note to [e-mail]
 * so we can mail you a copy immediately.
 * 
 * @category   Zend
 * @package    Zend_Mail
 * @subpackage Storage
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Imap.php 8928 2008-03-20 19:41:41Z thomas $
 */


/**
 * @see Zend_Mail_Storage_Abstract
 */
require_once 'Zend/Mail/Storage/Abstract.php';

/**
 * @see Zend_Mail_Protocol_Imap
 */
require_once 'Zend/Mail/Protocol/Imap.php';

/**
 * @see Zend_Mail_Storage_Writable_Interface
 */
require_once 'Zend/Mail/Storage/Writable/Interface.php';

/**
 * @see Zend_Mail_Storage_Folder_Interface
 */
require_once 'Zend/Mail/Storage/Folder/Interface.php';

/**
 * @see Zend_Mail_Storage_Folder
 */
require_once 'Zend/Mail/Storage/Folder.php';

/**
 * @see Zend_Mail_Message
 */
require_once 'Zend/Mail/Message.php';

/**
 * @see Zend_Mail_Storage
 */
require_once 'Zend/Mail/Storage.php';

/**
 * @category   Zend
 * @package    Zend_Mail
 * @subpackage Storage
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Mail_Storage_Imap extends Zend_Mail_Storage_Abstract
                             implements Zend_Mail_Storage_Folder_Interface, Zend_Mail_Storage_Writable_Interface
{
    // TODO: with an internal cache we could optimize this class, or create an extra class with
    // such optimizations. Especially the various fetch calls could be combined to one cache call

    /**
     * protocol handler
     * @var null|Zend_Mail_Protocol_Imap
     */
    protected $_protocol;

    /**
     * name of current folder
     * @var string
     */
    protected $_currentFolder = '';

    /**
     * imap flags to constants translation
     * @var array
     */
    protected static $_knownFlags = array('\Passed'   => Zend_Mail_Storage::FLAG_PASSED,
                                          '\Answered' => Zend_Mail_Storage::FLAG_ANSWERED,
                                          '\Seen'     => Zend_Mail_Storage::FLAG_SEEN,
                                          '\Deleted'  => Zend_Mail_Storage::FLAG_DELETED,
                                          '\Draft'    => Zend_Mail_Storage::FLAG_DRAFT,
                                          '\Flagged'  => Zend_Mail_Storage::FLAG_FLAGGED);

    /**
     * Count messages all messages in current box
     *
     * @return int number of messages
     * @throws Zend_Mail_Storage_Exception
     * @throws Zend_Mail_Protocol_Exception
     */
    public function countMessages()
    {
        if (!$this->_currentFolder) {
            /**
             * @see Zend_Mail_Storage_Exception
             */
            require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception('No selected folder to count');
        }

        // we're reselecting the current mailbox, because STATUS is slow and shouldn't be used on the current mailbox
        $result = $this->_protocol->select($this->_currentFolder);
        return $result['exists'];
    }

    /**
     * get a list of messages with number and size
     *
     * @param int $id number of message
     * @return int|array size of given message of list with all messages as array(num => size)
     * @throws Zend_Mail_Protocol_Exception
     */
    public function getSize($id = 0)
    {
        if ($id) {
            return $this->_protocol->fetch('RFC822.SIZE', $id);
        }
        return $this->_protocol->fetch('RFC822.SIZE', 1, INF);
    }

    /**
     * Fetch a message
     *
     * @param int $id number of message
     * @return Zend_Mail_Message
     * @throws Zend_Mail_Protocol_Exception
     */
    public function getMessage($id)
    {
        $data = $this->_protocol->fetch(array('FLAGS', 'RFC822.HEADER'), $id);
        $header = $data['RFC822.HEADER'];

        $flags = array();
        foreach ($data['FLAGS'] as $flag) {
            $flags[] = isset(self::$_knownFlags[$flag]) ? self::$_knownFlags[$flag] : $flag;
        }

        return new $this->_messageClass(array('handler' => $this, 'id' => $id, 'headers' => $header, 'flags' => $flags));
    }

    /*
     * Get raw header of message or part
     *
     * @param  int               $id       number of message
     * @param  null|array|string $part     path to part or null for messsage header
     * @param  int               $topLines include this many lines with header (after an empty line)
     * @param  int $topLines include this many lines with header (after an empty line)
     * @return string raw header
     * @throws Zend_Mail_Protocol_Exception
     * @throws Zend_Mail_Storage_Exception
     */
    public function getRawHeader($id, $part = null, $topLines = 0)
    {
        if ($part !== null) {
            // TODO: implement
            /**
             * @see Zend_Mail_Storage_Exception
             */
            require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception('not implemented');
        }

        // TODO: toplines
        return $this->_protocol->fetch('RFC822.HEADER', $id);
    }

    /*
     * Get raw content of message or part
     *
     * @param  int               $id   number of message
     * @param  null|array|string $part path to part or null for messsage content
     * @return string raw content
     * @throws Zend_Mail_Protocol_Exception
     * @throws Zend_Mail_Storage_Exception
     */
    public function getRawContent($id, $part = null)
    {
        if ($part !== null) {
            // TODO: implement
            /**
             * @see Zend_Mail_Storage_Exception
             */
            require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception('not implemented');
        }

        return $this->_protocol->fetch('RFC822.TEXT', $id);
    }

    /**
     * create instance with parameters
     * Supported paramters are
     *   - user username
     *   - host hostname or ip address of IMAP server [optional, default = 'localhost']
     *   - password password for user 'username' [optional, default = '']
     *   - port port for IMAP server [optional, default = 110]
     *   - ssl 'SSL' or 'TLS' for secure sockets
     *   - folder select this folder [optional, default = 'INBOX']
     *
     * @param  array $params mail reader specific parameters
     * @throws Zend_Mail_Storage_Exception
     * @throws Zend_Mail_Protocol_Exception
     */
    public function __construct($params)
    {
        if (is_array($params)) {
            $params = (object)$params;
        }

        $this->_has['flags'] = true;

        if ($params instanceof Zend_Mail_Protocol_Imap) {
            $this->_protocol = $params;
            try {
                $this->selectFolder('INBOX');
            } catch(Zend_Mail_Storage_Exception $e) {
                /**
                 * @see Zend_Mail_Storage_Exception
                 */
                require_once 'Zend/Mail/Storage/Exception.php';
                throw new Zend_Mail_Storage_Exception('cannot select INBOX, is this a valid transport?');
            }
            return;
        }

        if (!isset($params->user)) {
            /**
             * @see Zend_Mail_Storage_Exception
             */
            require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception('need at least user in params');
        }

        $host     = isset($params->host)     ? $params->host     : 'localhost';
        $password = isset($params->password) ? $params->password : '';
        $port     = isset($params->port)     ? $params->port     : null;
        $ssl      = isset($params->ssl)      ? $params->ssl      : false;

        $this->_protocol = new Zend_Mail_Protocol_Imap();
        $this->_protocol->connect($host, $port, $ssl);
        if (!$this->_protocol->login($params->user, $password)) {
            /**
             * @see Zend_Mail_Storage_Exception
             */
            require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception('cannot login, user or password wrong');
        }
        $this->selectFolder(isset($params->folder) ? $params->folder : 'INBOX');
    }

    /**
     * Close resource for mail lib. If you need to control, when the resource
     * is closed. Otherwise the destructor would call this.
     *
     * @return null
     */
    public function close()
    {
        $this->_currentFolder = '';
        $this->_protocol->logout();
    }

    /**
     * Keep the server busy.
     *
     * @return null
     * @throws Zend_Mail_Storage_Exception
     */
    public function noop()
    {
        if (!$this->_protocol->noop()) {
            /**
             * @see Zend_Mail_Storage_Exception
             */
            require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception('could not do nothing');
        }
    }

    /**
     * Remove a message from server. If you're doing that from a web enviroment
     * you should be careful and use a uniqueid as parameter if possible to
     * identify the message.
     *
     * @param   int $id number of message
     * @return  null
     * @throws  Zend_Mail_Storage_Exception
     */
    public function removeMessage($id)
    {
        if (!$this->_protocol->store(array(Zend_Mail_Storage::FLAG_DELETED), $id, null, '+')) {
            /**
             * @see Zend_Mail_Storage_Exception
             */